Cognitive fatigue

Cognitive fatigue (also called exhaustion, tiredness, lethargy, languidness, languor, lassitude, and listlessness) is a state usually associated with a weakening or depletion of one's mental resources.[1][2] The intensity and duration of this effect typically depends on the substance consumed and its dosage. It can also be further exacerbated by various factors such as a lack of sleep[3] or food[4]. These feelings of exhaustion involve a wide variety of symptoms which generally include some or all of the following effects: